MC A crowd has gathered for 1.8 miles along both sides of a Thanksgiving Day parade route. The crowd averages 12 feet wide. Use the rule of thumb that each person occupies 3.0 square feet and estimate the size of the crowd. Round the estimate to the nearest 100 people

Scores on a university exam are normally distributed with a mean of 78 and a standard deviation of 8. the professor teaching the class declares that a score of 70 or higher is required for a grade of at least “c.” using the 68-95-99.7 rule, what percentage of students failed to earn a grade of at least “c”?